Is Y99.9 a billable ICD-10 code?

Yes. Y99.9 (Unspecified external cause status) is billable and can be used for insurance claims. Always verify payer-specific requirements.

Y99.9 ✓ Billable

Unspecified external cause status

Q: What is ICD-10 code Y99.9?

ICD-10-CM code Y99.9 stands for "Unspecified external cause status". It is a billable code in the External Causes of Morbidity chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · External Causes of Morbidity

Code

Y99.9

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

External Causes of Morbidity

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code Y99.9?

ICD-10-CM code Y99.9 represents Unspecified external cause status. It is a billable diagnosis code in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.

Is Y99.9 billable?

Yes. Y99.9 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is Y99.9 in?

Y99.9 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.

Related codes in the Y99 category

Y99 External cause status Non-billable Y99.0 Civilian activity done for income or pay Billable Y99.1 Military activity Billable Y99.2 Volunteer activity Billable Y99.8 Other external cause status Billable

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